usb转串口使用的是pl2303芯片，linux2.4以上版本已经自带驱动。

1.安装minicom

Ubuntu中使用 sudo apt-get install minicom 安装即可

2.配置minicom

   # minicom -s
   Serial port setup [Enter]
    +-------------------------------------------------------------+
    | A -    Serial Device      : /dev/ttyUSB0                    |
    | B - Lockfile Location     : /var/lock                       |
    | C -   Callin Program      :                                 |
    | D - Callout Program      -:                                 |
    | E -    Bps/Par/Bits       : 115200 8N1                      |
    | F - Hardware Flow Control : No                              |
    | G - Software Flow Control : No                              |
    |                                                             |
    |    Change which setting?                                    |
    +-------------------------------------------------------------+
注: 如果没有使用USB转接口，Serial Device要配置为/dev/ttyS0

   Save setup as dfl
   Exit from Minicom

使用USB转串口需要注意：
首先要加载USB-serial转换线驱动：modprobe pl2303

查看状态：dmesg | grep pl2303

[ 2788.401258] usb 6-1: FTDI USB Serial Device converter now attached to ttyUSB0
[ 6664.718291] usbcore: registered new interface driver pl2303

3.使用minicom传输文件
--------------------------------------------------
# minicom
(Ctrl + a) --> s --> zmodem --> [Okay] --> 
    
    +-----------------------------------------+ 
    |No file selected - enter filename:       | 
    |> /home/zxl/ssl/codes/led/lls_led.ko     | [Enter]
    +-----------------------------------------+